Verify ItemsView, KeysView, and ValuesView in immutable_types

Summary: Implement `ItemsView`, `KeysView`, and `ValuesView` in immutable_types

Reviewed By: ahilger

Differential Revision: D67978114

fbshipit-source-id: c6cbaceff4296b8e2e93f05bed027a05e2d4919e

thrift/lib/python/test/maps.py

@@ -20,6 +20,8 @@
 
 import unittest
 
+from collections.abc import ItemsView, KeysView, ValuesView
+
 from enum import Enum
 from typing import Dict, Type, TypeVar
 
@@ -174,6 +176,18 @@ def test_contains_enum(self) -> None:
         self.assertIn(self.Color.blue, cmap.colorMap)
         self.assertNotIn(self.Color.green, cmap.colorMap)
 
+    def test_dict_views(self) -> None:
+        dmap = self.StrStrMap({"test": "value"})
+        dmap_keys = dmap.keys()
+        dmap_values = dmap.values()
+        dmap_items = dmap.items()
+        self.assertEqual(len(dmap_keys), 1)
+        self.assertEqual(len(dmap_values), 1)
+        self.assertEqual(len(dmap_items), 1)
+        self.assertIsInstance(dmap_keys, KeysView)
+        self.assertIsInstance(dmap_values, ValuesView)
+        self.assertIsInstance(dmap_items, ItemsView)
+
     def test_items_values(self) -> None:
         x = {"test": "value"}
         tx = self.StrStrMap(x)

thrift/lib/python/types.pyx

@@ -2153,7 +2153,6 @@ cdef class Set(Container):
 
 pySet.register(Set)
 
-
 cdef class MapTypeFactory:
     cdef object key_info
     cdef object val_info